Since Google hasn't yet released a Google Drive client for Linux and Grive seems to have been abandoned, many Linux users are using Insync. However, the Insync developers have stated that their tool will only be free while in beta, and the price hasn't been known until today.

The Insync Pro edition is available for $9.99 (introductory pricing; one time payment) after a 15 day free trial and there's also going to be a business edition which includes an admin dashboard as well as centralized billing with priority email support.

Insync for Linux is still in beta, so its users can continue to take advantage of this application for free until it's out of the beta. The application supports (comes with separate applets) most Linux desktop environments: Unity, Cinnamon, GNOME Shell, Xfce, LXDE, KDE and even MATE and it's available for Ubuntu, Linux Mint, Fedora, Red Hat Enterprise, openSUSE, Debian, Arch Linux, MEPIS and PCLinuxOS.

The price isn't much considering the effort put in by the Insync team to support most Linux desktop environments, but I can also agree with those who aren't willing to pay since Google Drive is a free service after all (unless you've upgraded). What do you think?